Uncertainty Analysis on Risk Assessment of Water Inrush in Karst Tunnels

Table 5

Risk evaluation risk level under different confidence coefficients.

Risk level	Confidence coefficient
Risk Level I
Risk Level I or risk Level II; slanting risk Level I
Risk Level I or risk Level II; slanting risk Level II
Risk Level II
Risk Level III or risk Level II; slanting risk Level II
Risk Level III or risk Level II; slanting risk Level III
Risk Level III
Risk Level IV or risk Level III; slanting risk Level III
Risk Level IV or risk Level III; slanting risk Level IV
Risk Level IV